Chasiempis sandwichensis
The Hawaiʻi ʻelepaio (Chasiempis sandwichensis), also Hawaiian ʻelepaio, is a monarch flycatcher found on the Big Island of Hawaii. Until 2010, all three ʻelepaio species, the Kauaʻi ʻelepaio (Chasiempis sclateri), the Oʻahu ʻelepaio (Chasiempis ibidis) and this species were considered conspecific.
Source: Wikipedia
Other members of the monarch flycatchers family recorded in North America — a useful place to start if you are not certain of your identification.
You don't need to spend a fortune. These four pairs will get you birding confidently on day one.
From phone adapters to dedicated rigs, here's what actually works for capturing birds in the field.